JP5741534B2 - Concentrated winding coil - Google Patents

Concentrated winding coil Download PDF

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JP5741534B2
JP5741534B2 JP2012172495A JP2012172495A JP5741534B2 JP 5741534 B2 JP5741534 B2 JP 5741534B2 JP 2012172495 A JP2012172495 A JP 2012172495A JP 2012172495 A JP2012172495 A JP 2012172495A JP 5741534 B2 JP5741534 B2 JP 5741534B2
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turn
height
cross
turns
teeth
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JP2014033532A (en
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弘樹 加藤
弘樹 加藤
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Toyota Motor Corp
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Toyota Motor Corp
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Priority to JP2012172495A priority Critical patent/JP5741534B2/en
Priority to PCT/IB2013/001603 priority patent/WO2014020398A2/en
Priority to EP13765409.1A priority patent/EP2853018A2/en
Priority to US14/412,059 priority patent/US9806573B2/en
Priority to CN201380033937.2A priority patent/CN104885344B/en
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    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K3/00—Details of windings
    • H02K3/04—Windings characterised by the conductor shape, form or construction, e.g. with bar conductors
    • H02K3/12—Windings characterised by the conductor shape, form or construction, e.g. with bar conductors arranged in slots
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K15/00—Methods or apparatus specially adapted for manufacturing, assembling, maintaining or repairing of dynamo-electric machines
    • H02K15/04—Methods or apparatus specially adapted for manufacturing, assembling, maintaining or repairing of dynamo-electric machines of windings, prior to mounting into machines
    • H02K15/0435—Wound windings
    • H02K15/0442—Loop windings
    • H02K15/045—Form wound coils
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K3/00—Details of windings
    • H02K3/04—Windings characterised by the conductor shape, form or construction, e.g. with bar conductors
    • H02K3/18—Windings for salient poles
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K2213/00—Specific aspects, not otherwise provided for and not covered by codes H02K2201/00 - H02K2211/00
    • H02K2213/03—Machines characterised by numerical values, ranges, mathematical expressions or similar information

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Windings For Motors And Generators (AREA)

Description

本発明は、集中巻コイルの構造に関する。   The present invention relates to a structure of a concentrated winding coil.

モータの損失を低減するにはステータのコイル占積率（導体断面積／コイル断面積）を大きくすることが有効である。このため、コイルを構成する導線として断面形状が丸形の丸線を多数層ティースに巻回するよりも断面形状が矩形の太い平角線をティースに一層に巻回する構造が用いられる場合が多い。一方、径方向に向かって周方向幅が略一定のティースが用いられる場合も多くなってきている。この場合、コイルの挿入されるスロットの周方向幅はティースの先端（ステータの内周側）に向って狭くなる。太い平角線をティースに一層に巻回してコイルを構成した場合には、丸線を多数層ティースに巻回する場合と異なり、コイルの断面形状をティースの長手方向に沿って変化させることが難しくなるのでステータ内周側での隣接コイル間の隙間が狭くなってしまうという問題があった。   In order to reduce the loss of the motor, it is effective to increase the coil space factor (conductor cross-sectional area / coil cross-sectional area) of the stator. For this reason, a structure in which a thick rectangular wire with a rectangular cross-sectional shape is wound around the teeth in one layer is often used as a conducting wire constituting the coil, rather than winding a round wire with a round cross-sectional shape around a multi-layered tooth. . On the other hand, there are many cases where teeth having a substantially constant circumferential width are used in the radial direction. In this case, the circumferential width of the slot into which the coil is inserted becomes narrower toward the tip of the teeth (inner side of the stator). When a coil is constructed by winding a thick flat wire around one layer of a tooth, it is difficult to change the cross-sectional shape of the coil along the longitudinal direction of the tooth, unlike when winding a round wire around multiple layers of teeth. Therefore, there is a problem that the gap between adjacent coils on the inner peripheral side of the stator becomes narrow.

そこで、スロットの形状に合わせてコイル全体の断面をティースの先端（ステータの内周側）に向って高さの低くなる台形とするように巻き線の断面形状を変化させる方法が提案されている（例えば、特許文献1参照）。   Therefore, a method has been proposed in which the cross-sectional shape of the winding is changed so that the cross-section of the entire coil is a trapezoid whose height decreases toward the tip of the teeth (inner side of the stator) according to the shape of the slot. (For example, see Patent Document 1).

特開２００１−１７８０５１号公報JP 2001-178051 A

しかし、特許文献1に記載されたコイルでは、コイルを構成する導線の断面形状、断面積をコイルのターン毎に変化させることが必要で、導線の形状が複雑となりコストアップとなってしまうという問題があった。   However, in the coil described in Patent Document 1, it is necessary to change the cross-sectional shape and cross-sectional area of the conducting wire constituting the coil for each turn of the coil, and the shape of the conducting wire becomes complicated and the cost increases. was there.

そこで、本発明は、簡便な構成でステータのコイル占積率を向上させることを目的とする。   Accordingly, an object of the present invention is to improve the coil space factor of the stator with a simple configuration.

本発明の集中巻コイルは、回転電機のステータに配置され、半径方向に向かって周方向幅が略一定なティースに導線を巻回した集中巻コイルであって、前記ティースの先端側から１ターンあるいは複数ターンの各導線の前記ティース表面からの各高さは、前記各導線の前記ティースの根元側に隣接する他の導線の前記ティース表面からの高さよりも低く、他のターンの各導線の前記ティース表面からの各高さは略同一で、前記１ターンあるいは前記複数ターンの各導線の前記ティース表面からの各高さよりも高く、前記他のターンの各導線の断面形状は略同一であり、前記１ターンあるいは前記複数ターンの各導線の断面形状は、前記他のターンの各導線の断面形状と異なり、前記１ターンあるいは前記複数ターンの各導線の断面積は、前記他のターンの各導線の断面積よりも小さく、周方向に隣接するティースに巻回した周方向に対向する各前記１ターンあるいは前記複数ターンの各導線間の周方向間隔の最小値は周方向に隣接するティースに巻回した対向する各他のターンの各導線の周方向間隔の最小値と同じかそれより小さいこと、を特徴とする。 The concentrated winding coil according to the present invention is a concentrated winding coil which is disposed on a stator of a rotating electrical machine and has a conductive wire wound around a tooth having a substantially constant circumferential width in the radial direction, and is one turn from the tip side of the tooth. Or each height from the teeth surface of each conducting wire of a plurality of turns is lower than the height from the teeth surface of other conducting wires adjacent to the root side of each of the conducting wires, and each conducting wire of other turns Each height from the surface of the teeth is substantially the same, higher than the height from the surface of the teeth of the one-turn or multi-turn conductors, and the cross-sectional shapes of the conductors of the other turns are substantially the same. The cross-sectional shape of each conductor of the one turn or the plurality of turns is different from the cross-sectional shape of each conductor of the other turn, and the cross-sectional area of each conductor of the one turn or the plurality of turns is Of smaller than the cross-sectional area of each conductor turn, the minimum value of the circumferential spacing between the conductors of each said one-turn or the plurality of turns opposite wound circumferentially teeth adjacent in the circumferential direction in the circumferential direction It is characterized by being equal to or smaller than the minimum value of the circumferential interval of each conducting wire of each other turn that is wound around adjacent teeth.

本発明の集中巻コイルにおいて、前記他のターンの各導線の断面形状は略平角形状であり、前記１ターンあるいは前記複数ターンの各導線の断面形状は、台形、五角形、三角または長方形であること、としても好適である。
 Te concentration Makiko yl odor of the present invention, the cross-sectional shape of each conductor before SL other turns are substantially rectangular shape, the cross-sectional shape of each conductor of the one-turn or the plurality of turns are trapezoidal, pentagonal, triangular or rectangular This is also preferable.

本発明は、簡便な構成でステータのコイル占積率を向上させることができるという効果を奏する。   The present invention produces an effect that the coil space factor of the stator can be improved with a simple configuration.

本発明の実施形態における集中巻きコイルが取り付けられた回転電機のステータの一部を示す図である。It is a figure which shows a part of stator of the rotary electric machine with which the concentrated winding coil in embodiment of this invention was attached. 本発明の他の実施形態における集中巻きコイルが取り付けられた回転電機のステータの一部を示す図である。It is a figure which shows a part of stator of the rotary electric machine with which the concentrated winding coil in other embodiment of this invention was attached. 本発明の他の実施形態における集中巻きコイルが取り付けられた回転電機のステータの一部を示す図である。 It is a figure which shows a part of stator of the rotary electric machine with which the concentrated winding coil in other embodiment of this invention was attached .

以下、図面を参照しながら本発明の実施形態について説明する。本発明の実施形態の集中巻きコイルが取り付けられる回転電機は、中心軸の周りに回転するロータの周囲に円周状にステータが配置されたものであり、例えば、一般的な回転式モータあるいは、モータジェネレータ、発電機などを含むものである。   Hereinafter, embodiments of the present invention will be described with reference to the drawings. The rotating electrical machine to which the concentrated winding coil of the embodiment of the present invention is attached has a stator arranged circumferentially around the rotor rotating around the central axis, for example, a general rotary motor or This includes motor generators, generators, and the like.

図１（ａ）に示すように、本実施形態の集中巻きコイル２０が取り付けられている回転電機のステータ１０は、ステータコア１２と、ステータコア１２に配置された複数のティース１４とを有している。   As shown in FIG. 1A, the stator 10 of the rotating electrical machine to which the concentrated winding coil 20 of the present embodiment is attached has a stator core 12 and a plurality of teeth 14 arranged on the stator core 12. .

ステータコア１２は、略円筒状のヨーク１３と、ヨーク１３の内周面１９から回転電機の回転中心軸の方向に向かって延びる複数のティース１４を有している。各ティース１４は、ヨーク１３の周方向に間隔をあけて配置され、各ティース１４の間の空間はスロット１８を形成する。各スロット１８の中には導線２１〜２６が配置され、この導線２１〜２６は１つのティース１４の周囲を回り、ティース１４に巻きついた導線２１〜２６により集中巻きコイル２０が形成される。なお、導線２１〜２６は連続した１本の導線のうち、ティース１４の根元１６側の第一ターンからティース１４の先端１５側の第六ターンの各ターンを構成する導線の部分である。   The stator core 12 has a substantially cylindrical yoke 13 and a plurality of teeth 14 extending from the inner peripheral surface 19 of the yoke 13 toward the rotation center axis of the rotating electrical machine. The teeth 14 are arranged at intervals in the circumferential direction of the yoke 13, and the space between the teeth 14 forms a slot 18. Conductive wires 21 to 26 are disposed in each slot 18, and the conductive wires 21 to 26 go around one tooth 14, and the concentrated winding coil 20 is formed by the conductive wires 21 to 26 wound around the tooth 14. In addition, the conducting wires 21 to 26 are portions of the conducting wire constituting each turn from the first turn on the base 16 side of the tooth 14 to the sixth turn on the tip 15 side of the tooth 14 among the continuous one conducting wire.

図１（ａ）に示すように、ティース１４は、ヨーク１３の内周面１９側の根元１６から先端１５に向けて一定の幅ｄを有しているものである。つまり、ティース１４は、回転電機の半径方向に向かって周方向の幅ｄが一定でヨーク１３の内周面１９から回転電機の中心軸に向かって突出している。このため、図１（ａ）に示すように、隣接する各ティース１４の各表面１７間の周方向の間隔は、ティース１４の先端１５あるいは、ステータ１０の内周側に向うにつれて狭くなってくる。   As shown in FIG. 1A, the teeth 14 have a constant width d from the root 16 on the inner peripheral surface 19 side of the yoke 13 toward the tip 15. That is, the teeth 14 have a constant circumferential width d toward the radial direction of the rotating electrical machine and protrude from the inner peripheral surface 19 of the yoke 13 toward the central axis of the rotating electrical machine. For this reason, as shown in FIG. 1A, the circumferential interval between the surfaces 17 of the adjacent teeth 14 becomes narrower toward the tip 15 of the teeth 14 or the inner peripheral side of the stator 10. .

図１（ｂ）に示すように、本実施形態では、図中左側のティース１４ａに巻回されている集中巻きコイル２０ａは、第一ターンから第五ターン、第六ターンの二種類のターンによって構成されている。第一ターンから第五ターンは、厚さＴ1、高さＨ1の長方形断面の平角線の導線２１ａ〜２５ａを厚さＴ1の辺がティース１４ａのスロット１８側の表面１７ａに対向し、高さＨ1の辺が表面１７ａから垂直方向に伸びるように、ティース１４ａの周りにそれぞれ巻回したものである。また、第六ターンは、厚さＴ1でティース１４ａの根元１６ａ側の高さが高さＨ1，ティース１４ａの先端１５ａ側の高さが根元側の高さＨ1より低い高さＨ2の台形断面の導線２６ａを厚さＴ1の辺がティース１４ａのスロット１８側の表面１７ａに対向し、高さＨ1，Ｈ2の各辺が表面１７ａから垂直方向に伸びるように、ティース１４ａの周りに巻回したものである。第一ターンから第五ターンを構成する導線２１ａ〜２５ａは同一の断面形状、断面積であり、第六ターンを構成する導線２６ａは導線２１ａ〜２５ａと断面形状が異なり、断面積は小さくなっている。また、第一ターンから第六ターンの各導線２１ａ〜２６ａは、ティース１４ａの延びる方向に略隙間のない状態で詰めて巻回されている。 As shown in FIG. 1 (b), in this embodiment, the concentrated winding coil 20a wound around the tooth 14a on the left side in the figure is divided into two types of turns from the first turn to the fifth turn and the sixth turn. It is configured. From the first turn to the fifth turn, rectangular conductor wires 21a to 25a having a thickness T 1 and a height H 1 are opposed to the surface 17a on the side of the slot 18 of the teeth 14a, with the sides having a thickness T 1 . the height H 1 of the sides so as to extend in the vertical direction from the surface 17a, in which wound respectively wound around the teeth 14a. In the sixth turn, the height T 1 of the tooth 14a on the root 16a side is the height H 1 , and the height H 2 on the tip 15a side of the tooth 14a is lower than the height H 1 on the root side. trapezoidal cross-section side of the thickness T 1 of the conductive wire 26a of faces the surface 17a of the slot 18 side of the tooth 14a, so that each side of the height H 1, H 2 extends from the surface 17a in the vertical direction, the teeth 14a It is wound around. The conducting wires 21a to 25a constituting the first turn to the fifth turn have the same cross-sectional shape and cross-sectional area, and the conducting wire 26a constituting the sixth turn is different from the conducting wires 21a to 25a and the cross-sectional area is reduced. Yes. Moreover, each conducting wire 21a-26a of the 1st turn to the 6th turn is packed and wound in the extending direction of the teeth 14a with substantially no gap.

つまり、図１（ｂ）の左側の集中巻きコイル２０ａでは、ティース１４ａの先端１５ａ側の第六ターンの導線２６ａの高さは、根元１６ａ側の第一から第五ターンの各導線２１ａ〜２５ａの共通の高さＨ1よりも低くなっている。 That is, in the concentrated winding coil 20a on the left side of FIG. 1B, the height of the sixth turn conductor 26a on the tip 15a side of the tooth 14a is the first to fifth turn conductors 21a to 25a on the root 16a side. Is lower than the common height H 1 .

また、図中左側のティース１４ａの右側に隣接するティース１４ｂに巻回されている集中巻きコイル２０ｂは、左側のティース１４ａに巻回されている集中巻きコイル２０ａと同様、厚さＴ1、ティース１４ｂの表面１７ｂからの高さＨ1の長方形断面の平角線の導線２１ｂ〜２５ｂがティース１４ｂに順次巻回される第一ターンから第五ターンと、厚さＴ1でティース１４ｂの根元１６ｂ側の高さが高さＨ1、ティース１４ｂの先端１５ｂ側の高さが根元側の高さＨ1より低い高さＨ2の台形断面の導線２６ｂがティース１４ｂに巻回される第六ターンを含んでいる。 Further, the concentrated winding coil 20b wound around the tooth 14b adjacent to the right side of the left tooth 14a in the drawing has the same thickness T 1 as the concentrated winding coil 20a wound around the left tooth 14a. a fifth turn from the first turn flat wire conductors 21b~25b height rectangular cross section of an H 1 from the surface 17b of 14b are sequentially wound on the teeth 14b, root 16b side of the tooth 14b in the thickness T 1 height height H 1, the sixth turn leading end 15b side of the height of the tooth 14b is the conductor 26b of the trapezoidal cross section of the root height lower height than H 1 of the side H 2 is wound around the teeth 14b Contains.

図１（ｂ）に示すように、スロット１８を挟んで対向する左右のティース１４ａ，１４ｂの各集中巻きコイル２０ａ，２０ｂの各導線２１ａ〜２６ａ，２１ｂ〜２６ｂはそれぞれスロット１８を挟んで対向するように配置され、対向する各導線２１ａ〜２５ａ，２１ｂ〜２５ｂの対向する面の間隔は、ティース１４ａ，１４ｂの先端１５ａ，１５ｂに向って小さくなっていき、各第五ターンの各導線２５ａ，２５ｂの先端１５ａ，１５ｂ側の角部あるいは、各第六ターンの各導線２６ａ，２６ｂの根元１６ａ，１６ｂ側の角部の間隔が最も狭く、最小間隔Ｓ1となっている。 As shown in FIG. 1B, the conductive wires 21 a to 26 a and 21 b to 26 b of the concentrated winding coils 20 a and 20 b of the left and right teeth 14 a and 14 b facing each other across the slot 18 are opposed to each other across the slot 18. The spacing between the opposing surfaces of the opposing conductors 21a to 25a and 21b to 25b is reduced toward the tips 15a and 15b of the teeth 14a and 14b, and the conductors 25a and 25a of each fifth turn are reduced. 25b of the tip 15a, the corner portion of the 15b side or each conductor 26a of each sixth turn, 26b of the base 16a, the narrowest distance between the corners of the 16b side, and has a minimum distance S 1.

第六ターンの各導線２６ａ，２６ｂは、各ティース１４ａ，１４ｂの先端１５ａ，１５ｂに向ってその高さが高さＨ1から高さＨ2に小さくなっており、各導線２６ａ，２６ｂの対向する面の間隔は最小間隔Ｓ1に保たれている。したがって、隣接する２つの集中巻きコイル２０ａ，２０ｂの間隔は、上記の最小間隔Ｓ1によって規定される。この最小間隔Ｓ1は、図１（ｂ）に一点鎖線２７ａ，２７ｂで示すように、各集中巻きコイル２０ａ，２０ｂの第一ターンから第六ターンの各導線２１ａ〜２６ｂを高さＨ2の平角導線とした場合の最小間隔と同様である。したがって、本実施形態の集中巻きコイル２０ａ，２０ｂは、第一ターンから第六ターンの各導線２１ａ〜２６ｂを高さＨ2の平角導線で構成した場合に比較して、同一の最小間隔Ｓ1を確保しつつ、より大きなコイル占積率とすることができるものである。 Each conductor 26a of the sixth turn, 26b, each tooth 14a, 14b of the tip 15a, is smaller that the height height from the height H 1 H 2 toward 15b, each conductor 26a, 26b facing the The interval between the surfaces to be operated is kept at the minimum interval S 1 . Thus, two adjacent concentrated winding coils 20a, 20b interval is defined by the minimum distance S 1 described above. The minimum distance S 1 is such that the conductive wires 21a to 26b from the first turn to the sixth turn of the concentrated winding coils 20a and 20b have a height H 2 , as indicated by alternate long and short dash lines 27a and 27b in FIG. This is the same as the minimum distance in the case of a flat conducting wire. Therefore, the concentrated winding coils 20a and 20b of the present embodiment have the same minimum spacing S 1 as compared to the case where the conducting wires 21a to 26b from the first turn to the sixth turn are constituted by rectangular conductors having a height of H 2. It is possible to obtain a larger coil space factor while securing the above.

以上述べたように、本実施形態では、先端１５側の第六ターンの導線２６の形状を先端１５に行くほど高さが低くなるような台形とするという簡便な方法により、コストアップを抑えつつ、ステータ１０のコイル占積率を向上させ、損失を効果的に低減することができるという効果を奏する。   As described above, in the present embodiment, the cost is reduced by a simple method in which the shape of the lead wire 26 of the sixth turn on the tip 15 side is a trapezoid whose height decreases toward the tip 15. The coil space factor of the stator 10 can be improved, and the loss can be effectively reduced.

なお、本実施形態では、各導線２６ａ，２６ｂの対向する面の間隔は最小間隔Ｓ1に保たれていることとして説明したが、導線２６ａ，２６ｂの先端１５ａ，１５ｂ側の高さＨ2をより小さくして、各導線２６ａ，２６ｂの対向する面の間隔が先端１５ａ，１５ｂに向うほど最小間隔Ｓ1よりも広がるように構成してもよい。また、第六ターンの導線２６ａ，２６ｂの根元１６ａ，１６ｂ側の辺の高さを高さＨ1よりも小さくしてもよい。更に、本実施形態では、第六ターンの導線２６ａ，２６ｂの断面積は、他のターンの各導線２１ａ~２５ｂの断面積よりも小さいこととして説明したが、例えば、導線２６ａ，２６ｂの厚さをＴ1よりも厚くすることによって最小間隔Ｓ1を保ちつつ、他のターンの導線２１ａ~２５ｂと同一の断面積として構成してもよい。 In the present embodiment, each conductor 26a, spacing the opposing surfaces of 26b has been described as what is kept to a minimum spacing S 1, conductors 26a, 26b of the tip 15a, and 15b side height H 2 and smaller, the wires 26a, opposing surfaces of spacing the leading end 15a of 26b, may be configured to spread than the minimum distance S 1 as toward the 15b. Further, conductors 26a of the sixth turn, 26b of the base 16a, may be smaller than the side of the height the height H 1 of 16b side. Furthermore, in the present embodiment, it has been described that the cross-sectional area of the conductors 26a and 26b of the sixth turn is smaller than the cross-sectional area of the conductors 21a to 25b of the other turns, but for example, the thickness of the conductors 26a and 26b the while maintaining the minimum spacing S 1 by thicker than T 1, may be configured as the same cross-sectional area and conductor 21a ~ 25b of the other turns.

次に図２を参照しながら、本発明の他の実施形態について説明する。図１（ａ）、図１（ｂ）を参照して説明した実施形態と同様の部分には同様の符号を付して説明は省略する。図２に示すように、本実施形態は、ティース１４ａ，１４ｂの先端１５ａ，１５ｂ側の第六ターンを構成する各導線２６ａ，２６ｂの各先端１５ａ，１５ｂ側の対向する各角部を切り欠いて、各導線２６ａ，２６ｂの断面形状を五角形としたものである。   Next, another embodiment of the present invention will be described with reference to FIG. Parts similar to those of the embodiment described with reference to FIGS. 1A and 1B are denoted by the same reference numerals, and description thereof is omitted. As shown in FIG. 2, in the present embodiment, the opposing corners on the tips 15a, 15b side of the conductors 26a, 26b constituting the sixth turn on the tips 15a, 15b side of the teeth 14a, 14b are cut out. The cross-sectional shape of each of the conductive wires 26a and 26b is a pentagon.

図２に示すように、図中左側のティース１４ａに巻回されている集中巻きコイル２０ａは、先に図１を参照して説明した実施形態と同様、厚さＴ3、高さＨ3の長方形断面の平角線の導線２１ａ〜２５ａがティース１４ａに順次巻回される第一ターンから第五ターンと、厚さＴ3でティース１４ａの根元１６ａ側から厚さＴ4の部分の高さが高さＨ3、それよりも先端１５ａ側の高さが根元側の高さＨ3より低い高さＨ4の五角形の導線２６ａがティース１４ａに巻回される第六ターンを含んでいる。つまり、この導線２６ａは先に説明したように、導線２６ｂと対向する先端１５ａ側の角部を切り欠いた五角形の形状となっている。図中左側のティース１４ａの右側に隣接するティース１４ｂに巻回されている集中巻きコイル２０ｂの第一ターンから第六ターンの各導線２１ｂ〜２６ｂも導線２１ａ〜２６ａと同様の構成となっている。 As shown in FIG. 2, the concentrated winding coil 20a wound around the left tooth 14a has a thickness T 3 and a height H 3 as in the embodiment described above with reference to FIG. from the first turn and the fifth turn lead 21a~25a of rectangular cross-section of the flat wire is sequentially wound on the teeth 14a, the height of the thickness T 4 of the portion from the root 16a side of the tooth 14a with a thickness of T 3 the height H 3, the height of the tip 15a side contains a sixth turn pentagonal conductor 26a of the base side of the height H 3 from the lower height H 4 is wound around the teeth 14a than that. That is, as described above, the conducting wire 26a has a pentagonal shape in which a corner on the tip 15a side facing the conducting wire 26b is notched. In the drawing, the conductors 21b to 26b from the first turn to the sixth turn of the concentrated winding coil 20b wound around the tooth 14b adjacent to the right side of the left tooth 14a have the same configuration as the conductors 21a to 26a. .

図２に示すように、各集中巻きコイル２０ａ，２０ｂのスロット１８を挟んで対向する各導線２１ａ〜２６ａ，２１ｂ〜２６ｂの対向する面の間隔は、ティース１４ａ，１４ｂの先端１５ａ，１５ｂに向って小さくなっていき、第六ターンの各導線２６ａ，２６ｂの根元１６ａ，１６ｂから先端１５ａ，１５ｂ側に向って厚さＴ4に位置する各角部の間隔が最も狭く、最小間隔Ｓ3となっている。第六ターンの各導線２６ａ，２６ｂは、厚さＴ4の位置の角部から各ティース１４ａ，１４ｂの先端１５ａ，１５ｂに向って高さが小さくなり、先端１５ａ，１５ｂでの高さは高さＨ4となっている。この間、各導線２６ａ，２６ｂの対向する面の間隔は最小間隔Ｓ3に保たれている。したがって、隣接する２つの集中巻きコイル２０ａ，２０ｂの間隔は、上記の最小間隔Ｓ3によって規定される。この最小間隔Ｓ3は、図２に一点鎖線２７ａ，２７ｂで示すように、第一ターンから第六ターンの各導線２１ａ，２６ｂを全て高さＨ4の平角導線とした場合の最小間隔と同様である。 As shown in FIG. 2, the distance between the opposing surfaces of the conductive wires 21a to 26a and 21b to 26b facing each other across the slot 18 of the concentrated winding coils 20a and 20b is directed to the tips 15a and 15b of the teeth 14a and 14b. The distance between the corners located at the thickness T 4 from the roots 16a, 16b of the conductors 26a, 26b of the sixth turn toward the tips 15a, 15b is the narrowest, and the minimum distance S 3 It has become. Each conductor 26a of the sixth turn, 26b, each tooth 14a from the corner of the position in the thickness T 4, 14b of the tip 15a, the height becomes smaller toward the 15b, the tip 15a, the height of at 15b is high and has a H 4 is. During this time, the distance between each conductor 26a, 26b opposing surfaces of is kept to a minimum spacing S 3. Thus, two adjacent concentrated winding coils 20a, 20b interval is defined by the minimum distance S 3 above. This minimum interval S 3 is the same as the minimum interval when the conductors 21a, 26b from the first turn to the sixth turn are all rectangular conductors with a height H 4 as shown by alternate long and short dash lines 27a, 27b in FIG. It is.

以上説明した実施形態では、第六ターンの導線２６の形状を先端１５側の角部を切り欠いた五角形とし、導線２６の高さを他のターンの各導線２１〜２５の高さよりも低くするという簡便な方法により、コストアップを抑えつつ、ステータ１０のコイル占積率を向上させ、損失を効果的に低減することができるという効果を奏する。   In the embodiment described above, the shape of the conducting wire 26 of the sixth turn is a pentagon with the corner portion on the tip 15 side cut out, and the height of the conducting wire 26 is made lower than the heights of the conducting wires 21 to 25 of other turns. With this simple method, the coil space factor of the stator 10 can be improved and the loss can be effectively reduced while suppressing an increase in cost.

なお、本実施形態では、各導線２６ａ，２６ｂの対向する面の間隔は最小間隔Ｓ3に保たれていることとして説明したが、導線２６ａ，２６ｂの先端１５ａ，１５ｂ側の高さＨ4をより小さくして、各導線２６ａ，２６ｂの対向する面の間隔が先端１５ａ，１５ｂに向うほど最小間隔Ｓ3よりも広がるように構成してもよい。また、第六ターンの導線２６ａ，２６ｂの根元１６ａ，１６ｂ側の厚さＴ4の部分の高さを高さＨ3よりも小さくしてもよい。 In the present embodiment, each conductor 26a, spacing the opposing surfaces of 26b has been described as what is kept to a minimum spacing S 3, conductors 26a, 26b of the tip 15a, and 15b side height H 4 and smaller, the wires 26a, opposing surfaces of spacing the leading end 15a of 26b, may be configured to spread than the minimum spacing S 3 more toward the 15b. Alternatively, the height T 4 of the sixth turn conductors 26a, 26b on the side of the bases 16a, 16b may be smaller than the height H 3 .

次に図３を参照しながら本発明の他の実施形態について説明する。先に図１、図２を参照して説明した実施形態と同様の部分には同様の符号を付して説明は省略する。図３に示すように、本実施形態は、ティース１４ａ，１４ｂの先端１５ａ，１５ｂ側の３つのターン、すなわち、第四、第五、第六ターンの各導線２４ａ，２４ｂ、導線２５ａ，２５ｂ,導線２６ａ，２６ｂの各断面形状をそれぞれ五角形、台形、三角形としたものである。各導線２４ａ〜２６ｂの各断面形状は、第一ターンから第三ターンの各導線２１ａ〜２３ｂの断面形状とは異なる断面形状となっており、その断面積も導線２１ａ〜２３ｂの断面積よりも小さくなっている。   Next, another embodiment of the present invention will be described with reference to FIG. Parts similar to those of the embodiment described above with reference to FIGS. 1 and 2 are denoted by the same reference numerals, and description thereof is omitted. As shown in FIG. 3, in the present embodiment, three turns on the tips 15a and 15b side of the teeth 14a and 14b, that is, the fourth, fifth, and sixth turns of the conductive wires 24a and 24b, and the conductive wires 25a and 25b, The cross-sectional shapes of the conductors 26a and 26b are pentagonal, trapezoidal, and triangular, respectively. Each cross-sectional shape of each conducting wire 24a-26b is a cross-sectional shape different from the cross-sectional shape of each conducting wire 21a-23b from the first turn to the third turn, and the cross-sectional area is also larger than the cross-sectional area of the conducting wires 21a-23b. It is getting smaller.

図３に示すように、図中左側のティース１４ａに巻回されている集中巻きコイル２０ａは、第一ターンから第三ターン、第四ターン、第五ターン、第六ターンの四種類のターンによって構成されている。第一ターンから第三ターンは、先に図１，図２を参照して説明した実施形態と同様、厚さＴ5、高さＨ5の長方形断面の平角線の導線２１ａ〜２３ａをティース１４ａに順次巻回したものである。第四ターンは、厚さＴ5でティース１４ａの根元１６ａ側から厚さＴ6の部分の高さが高さＨ5、それよりも先端１５ａ側の高さが根元側の高さＨ5より低く最低高さが高さＨ6の五角形の導線２４ａをティース１４ａに巻回したものである。第五ターンは、厚さＴ5でティース１４ａの根元１６ａ側の高さが導線２４ａの先端１５ａ側の高さと同一の高さＨ6，先端１５ａ側の高さが根元１６ａ側の高さＨ6より低い高さＨ7の台形断面の導線２５ａをティース１４ａに巻回したものである。第六ターンは、厚さＴ5でティース１４ａの根元１６ａ側の高さが導線２５ａの先端１５ａ側の高さと同一の高さＨ7，先端１５ａ側の高さがゼロの三角形断面の導線２６ａをティース１４ａに巻回したものである。 As shown in FIG. 3, the concentrated winding coil 20a wound around the tooth 14a on the left side of the figure is divided into four types of turns from the first turn to the third turn, the fourth turn, the fifth turn, and the sixth turn. It is configured. Third turn from the first turn, Figure 1 above, similar to the embodiment described with reference to FIG. 2, the thickness T 5, the conductor 21a~23a rectangular wire of rectangular cross-section height H 5 teeth 14a Are wound sequentially. Fourth turn, the thickness T 5 at the portion of the height the height H 5 in the thickness T 6 from the root 16a side of the tooth 14a, the height of it from even the tip 15a side than the height H 5 root side pentagonal conductor 24a of lower minimum height height H 6 in which wound around the teeth 14a. Fifth turn, thickness T 5 at the level height of the base 16a side is the same as the height of the tip 15a side of the conductive wire 24a of the tooth 14a H 6, the height H of the base 16a side height of the tip 15a side the conductor 25a of trapezoidal cross-section of lower height H 7 from 6 in which wound around the teeth 14a. Sixth turn, the thickness T 5 at the teeth 14a of the base 16a side of the height conductors 25a at the tip 15a of the same height of the side height H 7, wires 26a of triangular cross-section of the height of the tip 15a side zero Is wound around the teeth 14a.

つまり、本実施形態では、図２の左側の集中巻きコイル２０ａは、ティース１４ａの先端１５ａ側の３つのターン（第四から第六ターン）の各導線２４ａ〜２６ｂの高さは、第四ターンの導線２４ａの厚さＴ6の部分を除き除き、その他のターン（第一ターンから第三ターン）の各導線２１ａ〜２３ａの共通高さＨ5よりも低くなっている。また、第五ターンの導線２５ａの高さは導線２５ａの根元１６ａ側に隣接する導線２４ａの高さよりも低く、第六ターンの導線２６ａの高さは導線２６ａの根元１６ａ側に隣接する導線２５ａの高さよりも低くなるように構成されている。そして、第一から第三ターンの各導線２１ａから２３ａの各高さは略同一で、先端１５ａ側の第四ターンから第六ターンの各導線２４ａ〜２６ａの高さよりも高くなっている。各導線２４ａ〜２６ａの断面積は根元１６ａ側の導線２３ａの断面積よりも小さく、導線２４ａ，２５ａ，２６ａと先端１５ａに行くほど断面積は順次小さくなっている。図中左側のティース１４ａの右側に隣接するティース１４ｂに巻回されている集中巻きコイル２０ｂの第一ターンから第六ターンの各導線２１ｂ〜２６ｂも導線２１ａ〜２６ａと同様の構成となっている。 That is, in this embodiment, the concentrated winding coil 20a on the left side of FIG. 2 is configured so that the heights of the conductive wires 24a to 26b of the three turns (fourth to sixth turns) on the tip 15a side of the tooth 14a are the fourth turn. the exception except thickness portion of the T 6 conductors 24a, is lower than the common height H 5 of each conductor 21a~23a other turn (first turn from the third turn). The fifth turn conductor 25a is lower in height than the conductor 24a adjacent to the root 16a of the conductor 25a, and the sixth turn conductor 26a is higher in the conductor 25a adjacent to the root 16a. It is comprised so that it may become lower than the height of. The heights of the conductors 21a to 23a of the first to third turns are substantially the same, and are higher than the heights of the conductors 24a to 26a of the fourth to sixth turns on the tip 15a side. The cross-sectional area of each of the conducting wires 24a to 26a is smaller than the cross-sectional area of the conducting wire 23a on the base 16a side, and the cross-sectional area gradually decreases toward the conducting wires 24a, 25a, 26a and the tip 15a. In the drawing, the conductors 21b to 26b from the first turn to the sixth turn of the concentrated winding coil 20b wound around the tooth 14b adjacent to the right side of the left tooth 14a have the same configuration as the conductors 21a to 26a. .

図３に示すように、各集中巻きコイル２０ａ，２０ｂのスロット１８を挟んで対向する各導線２１ａ〜２６ａ，２１ｂ〜２６ｂの面の間隔は、ティース１４ａ，１４ｂの先端１５ａ，１５ｂに向って小さくなっていき、各第四ターンの各導線２４ａ，２４ｂの根元１６ａ，１６ｂから先端１５ａ，１５ｂ側に向って厚さＴ6に位置する各角部の間隔が最も狭く、最小間隔Ｓ5となっている。第四ターンの各導線２４ａ，２４ｂは、厚さＴ6の位置の角部から各ティース１４ａ，１４ｂの先端１５ａ，１５ｂに向ってその高さが小さくなり先端１５ａ側では高さＨ6となり、第五ターンの各導線２５ａ，２５ｂは、根元１６ａ側の高さＨ6から先端１５ａ側の高さＨ7に向って高さが低くなり、第六ターンの各導線２６ａ，２６ｂは、根元１６ａ側の高さＨ7から先端１５ａ側の高さゼロに向って高さが低くなっている。そして、本実施形態では導線２４ａ〜２６ａ、２４ｂ〜２６ｂの先端１５ａ，１５ｂに向う傾斜部分（各導線２１ａ〜２６ａ，２４ｂ〜２６ｂの各斜辺の面）は、同一平面となっており、その対向する面の間隔は、先端１５ａ，１５ｂに向って最小間隔Ｓ5よりも広がるように構成されている。 As shown in FIG. 3, the space | interval of the surface of each conducting wire 21a-26a, 21b-26b which opposes across the slot 18 of each concentrated winding coil 20a, 20b is small toward the front-end | tip 15a, 15b of teeth 14a, 14b. The distance between the corners located at the thickness T 6 from the roots 16a, 16b of the conductive wires 24a, 24b of each fourth turn toward the tips 15a, 15b is the narrowest, and the minimum distance S 5 is obtained. ing. Each conductor 24a of the fourth turn, 24b, each tooth 14a from the corner of the position in the thickness T 6, 14b of the tip 15a, the height H 6 becomes in its height decreases tip 15a side to 15b, each conductor 25a of the fifth turn, 25b is the height becomes lower toward the height H 7 of the tip 15a side of the base 16a side from a height H 6, each conductor 26a of the sixth turn, 26b is the root 16a The height decreases from the height H 7 on the side toward the height zero on the tip 15a side. And in this embodiment, the inclination part (surface of each hypotenuse of each conducting wire 21a-26a, 24b-26b) which faces the front-end | tip 15a, 15b of conducting wire 24a-26a, 24b-26b is the same plane, The opposition spacing of surfaces is configured to extend than the minimum spacing S 5 toward the distal end 15a, 15b.

なお、本実施形態では、導線２４ａ，２４ｂ根元１６ａ，１６ｂ側の高さと導線２３ａ，２３ｂの先端１５ａ，１５ｂ側の高さは同じ高さＨ5として説明したが、各導線２４ａ〜２６ａ，２４ｂ〜２６ｂの高さはその導線の根元１６ａ，１６ｂ側に隣接する他の導線の高さよりも低くなっていればよい。例えば、具体的には、導線２４ａ，２４ｂの根元１６ａ，１６ｂ側の高さは導線２３ａ，２３ｂの先端１５ａ，１５ｂ側の高さよりも低くてもよい。同様に、導線２５ａ，２５ｂの根元１６ａ，１６ｂ側の高さは導線２４ａ，２４ｂの先端１５ａ，１５ｂ側の高さよりも低くてもよいし、導線２６ａ，２６ｂの根元１６ａ，１６ｂ側の高さは導線２５ａ，２５ｂの先端１５ａ，１５ｂ側の高さよりも低くてもよい。 In the present embodiment, conductors 24a, 24b root 16a, 16b side of the high and conductor 23a, 23b of the tip 15a, the height of the 15b side is described as the same height H 5, each conductor 24A～26a, 24b The height of -26b should just be lower than the height of the other conducting wire adjacent to the base 16a, 16b side of the conducting wire. For example, specifically, the height of the conductors 24a, 24b on the bases 16a, 16b side may be lower than the height of the conductors 23a, 23b on the tips 15a, 15b side. Similarly, the height of the conductors 25a, 25b on the bases 16a, 16b side may be lower than the height of the conductors 24a, 24b on the tips 15a, 15b side, or the height of the conductors 26a, 26b on the bases 16a, 16b side. May be lower than the height of the conductors 25a, 25b on the ends 15a, 15b side.

本実施形態では、先端１５側の第四から第六ターンの導線２４から２６の断面形状を先端１５に行くほど高さが低くなるような五角形、台形、三角形とするという簡便な方法により、コストアップを抑えつつ、ステータ１０のコイル占積率を向上させ、損失を効果的低減することができるという効果を奏する。なお、本実施形態では先端１５側の３つのターンの断面形状を根元１６側の他のターンの導線の断面形状と異なる形状とすることとして説明したが、先端１５側の３つのターンに限らず、例えば、４−６ターンの断面形状を根元１６側の他のターンの断面形状と異なる形状とするようにしてもよい。   In this embodiment, the cross-sectional shape of the fourth to sixth turns 24 to 26 on the tip 15 side is a pentagon, trapezoid, or triangle that has a height that decreases toward the tip 15. While suppressing the increase, the coil space factor of the stator 10 is improved, and the loss can be effectively reduced. In the present embodiment, the cross-sectional shape of the three turns on the tip 15 side is described as being different from the cross-sectional shape of the conductors of the other turns on the base 16 side, but the present invention is not limited to the three turns on the tip 15 side. For example, the cross-sectional shape of 4-6 turns may be different from the cross-sectional shape of other turns on the root 16 side.

１０ ステータ、１２ ステータコア、１３ ヨーク、１４，１４ａ，１４ｂ ティース、１５，１５ａ，１５ｂ 先端、１６，１６ａ，１６ｂ 根元、１７，１７ａ，１７ｂ 表面、１８ スロット、１９ 内周面、２０，２０ａ，２０ｂ 集中巻きコイル、２１〜２６，２１ａ〜２６ａ，２１ｂ〜２６ｂ 導線、２７ａ，２７ｂ 一点鎖線。   10 stator, 12 stator core, 13 yoke, 14, 14a, 14b teeth, 15, 15a, 15b tip, 16, 16a, 16b root, 17, 17a, 17b surface, 18 slots, 19 inner peripheral surface, 20, 20a, 20b Concentrated winding coil, 21-26, 21a-26a, 21b-26b Conductor, 27a, 27b One-dot chain line.

Claims (2)

回転電機のステータに配置され、半径方向に向かって周方向幅が略一定なティースに導線を巻回した集中巻コイルであって、
前記ティースの先端側から１ターンあるいは複数ターンの各導線の前記ティース表面からの各高さは、前記各導線の前記ティースの根元側に隣接する他の導線の前記ティース表面からの高さよりも低く、
他のターンの各導線の前記ティース表面からの各高さは略同一で、前記１ターンあるいは前記複数ターンの各導線の前記ティース表面からの各高さよりも高く、
前記他のターンの各導線の断面形状は略同一であり、
前記１ターンあるいは前記複数ターンの各導線の断面形状は、前記他のターンの各導線の断面形状と異なり、
前記１ターンあるいは前記複数ターンの各導線の断面積は、前記他のターンの各導線の断面積よりも小さく、
周方向に隣接するティースに巻回した周方向に対向する各前記１ターンあるいは前記複数ターンの各導線間の周方向間隔の最小値は周方向に隣接するティースに巻回した対向する各他のターンの各導線の周方向間隔の最小値と同じかそれより小さいこと、
を特徴とする集中巻コイル。 A concentrated winding coil that is disposed on a stator of a rotating electrical machine and wound a conductive wire on a tooth having a substantially constant circumferential width in the radial direction,
The height of each lead wire of one turn or a plurality of turns from the tip side of the teeth from the tooth surface is lower than the height of the other lead wires adjacent to the base side of the teeth from the tooth surface. ,
The heights of the conductors of the other turns from the teeth surface are substantially the same, and are higher than the heights of the conductors of the one turn or the plurality of turns from the teeth surface,
The cross-sectional shape of each conducting wire of the other turns is substantially the same,
The cross-sectional shape of each conductor of the one turn or the plurality of turns is different from the cross-sectional shape of each conductor of the other turn,
The cross-sectional area of each conductor of the one turn or the plurality of turns is smaller than the cross-sectional area of each conductor of the other turn,
The minimum value of the circumferential interval between the one-turn or multi-turn conductive wires wound around the teeth adjacent in the circumferential direction is equal to each other wound around the teeth adjacent in the circumferential direction. Less than or equal to the minimum circumferential spacing of each conductor of the turn,
Concentrated winding coil. 請求項１に記載の集中巻コイルであって、
前記他のターンの各導線の断面形状は略平角形状であり、
前記１ターンあるいは前記複数ターンの各導線の断面形状は、台形、五角形、三角または長方形であること、
を特徴とする集中巻コイル。 The concentrated winding coil according to claim 1,
The cross-sectional shape of each conducting wire of the other turns is a substantially rectangular shape,
The cross-sectional shape of each conductor of the one turn or the plurality of turns is a trapezoid, a pentagon, a triangle, or a rectangle,
Concentrated winding coil.
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